Heating and mixing plant.



H. w. ASH, HEATING AND MIXING PLANT.

APPLICATION PXLED 0011B, 1910.

1,067,210. Patented July 8, 1913.

6 SHEETS-SHEET 1.

MTHE'EE E5:

H. W. ASH.

HEATING AND MIXING PLANT.

urmoumn FILED 00'1'.18, 1am

1,067,210. I Patented July 8,1913.-

6 SHEETS-SHEET 2.

H. W. ASH. HEATING AND MIXING PLANT.-

APPLICATION FILED 0OT.18, 1910. 1,067,210.

Patented July 8, 1913.

6 SHEETS-BHEBT 3.

H. W. ASH.

HEATING AND MIXING PLANT.

APPLICATION nun 001'.18, 1910.

6 SHEETS-SHEET 4.

Patented July 8, 1913.

H. W. ASH.

HEATING AND MIXING PLANT.

APPLICATION FILED 001219, 1910 1,067,210. Patented July 8,1913.

6 SHEETSSHBET 5.

Fig- 5- NAT JEEEE: s: Pk/ENTER:

M 6W Mu 191 079 6 1 M LEV 1 11 v H. W. ASH.

HEATING AND MIXING PLANT.

APPLICATION FILED 0OT.18, 1910.

Patented July 8, 1913.

6 SHEETS-SHEET 6 \X/ITHEE '5 r: 5 16. akin/$.1 d 021.

UNITED STATES PALFENT OFFICE.

HORACE W. ASH, Oi? VZINCHESTER, MASSACHUSETTS, ASSIGNOR T WARRENBROTHERS COMPANY, OF CHARLESTON, \VEST VIRGINIA, A. CORPORATION OF WESTVIRGINIA.

HEATING AND MIXING PLANT.

Specification of Letters Patent.

Patented July 8, 1913.

Application filed October 18, 1910. Serial No. 587,707.

To all whom it may concern:

Be it known that I, HORACE lV. ASH. of

. Winchester, in the vcounty of Middlesex and State of Massachusetts, acitizen of the United States, have invented a new and useful Improvementin Heating and Mixing Plants, of: which the following is aspecificntion.

My invention relates to a heating and mixing plant and more particularlyto a plant for heating the mineral ingredients for bituminous pavementsand for mixing them with the bituminous cement.

It comprises a rotary dryingand mixing drum, means for supplying it withheat; for feeding the mineral and bitumin0us,components to it; forintermingling the contents of one end of the cylinder with that oftheother and vfor discharging the mii'ed ingredients after the operation iscomplete.

lhe usual apparatus for heating and mixing bituminous mixtures forstreet pave merits of this type do not have positive means forint-ermingling the contents of one portion of the drum with that ofother por tions of the drumrand as a result the resulting mixturevariesto a very great extent, both as to the percentage of thebituminous cement in the difit'erent portions of the same batch, 2 ilalso as to the relative proportions of tho .lerent sized particles oftie min eral ingr iients in different portions of the batch. i v "I.Q0l1' the temperature varies in ditiercnt portions of the batch so thatthe batch is notuniform in any way. To obmate the disadvantages Iprovide for a means ot conveying the contents of the re-,

volving cylinder from the receivin openingioward the discharge openingwhich may also serve to mix the mineral particles thor oughl v so thatthey are uniformly heated or ted as the c may be and an independentmeans of invcying the material back toward the feed opening at adifferent rate of speed.

My invention also rovides a conveying itcrior of the shell ys coveredwith Iiuitfl'l i drum so that rcimlc contents of the drum does not 2portion carried rolls back the mate- I will now describe the inventionin detail in connection with the drawings forming a' part of thespecification: 4

In the drawings :Figure 1 is a side elevation of a machine embodying myinven tion, Fig. 2 being a plan view thereof, omitting the cement bucketand Weighcr, a por tion of the top of the drum being broken away. Fig. 3is a front elevation and Fig. 4 is a rear elevation, the boiler andengine being removed. Fig. 5 is a vertical section across the drum online 5-5 of Fig. 6, and Fig. 6 is a vertical longitudinal section of thedrum showing one of the beams on which the drum is supported, these twoviews being on an enlarged scale.

A is a boiler of ordinary construction sup plying steam by means ofwhich the engine B and the oil pump C are operated.- For convenienceofmovin I prefer to mount the boiler and the rest 0 the meehanism'on arectangular frame D which in turn is mounted on traction wheels E in anyconvenient way.

F is the exterior of a conveyer chamber. The conveyer and its inclosuremay be of anyusuitable construction of bucket conveyer adapted to raisethe stones which areto form the mineral ag 'regate of the-pavement, thematerial for w ich is to be prepared by this machine. Suclnconveyers arewell known in the art and n'eed not be described except to say that f isthe hopper through which stone. is fed to the conveyer; f is thedelivery tube by means of which the stones are directed from the top ofthe conveyor into a bin G and f is a belt tightene'r by means of whichany slack in the conveyor belt may be taken up.

f" is a sprocket wheel -on a shaft which carries the upper end of theconveyer. Power is applied to this sprocket wheel f by means or a chainwhich also runs over a sprocket wheel i on the shaft H. Power is appliedto this shaft from the main shaft J of the engine B by means of thepinion 9', on shaft- J and gear h mounted on the shaft H. 5

L is the drum the exterior of which is cylindrical and which carriestracks Z which run on trunnion wheels Z; This drum L also carries a gearL which is in mesh with a pinion 74- on shaft so that the rotation 1 ofthe shaft H also caulscs the rotation of i the drum L.

Supports are mounted on the frame D carrying bearings k for the shaft K.This shaft carries at one end the gear [62 which is in'mesh with thegear hfrom which it receires power. The 'shaftKpasses through the drumLand carries a spiral conveyer. K so that. the rotation of the shaft Koperates this conveyer. This spiral conveyer K lies in a trough K? whichruns nearly the length of the drum as shown in Fig. 6.

l .The drum is provided with a spiralconveye'r L attached to itsinteriorperipheral surface, that is, a continuous spiral shelf which begins atthe inlet of the drum and ends near its farther end. The purpose of thisspiral conveyer is .toconvey the material which is fed. into'thedrumfrom its entrance toward its outlet. Near its outlet the interior of thedrum is provided with a series of trays L arranged so that the materialfed or conveyed by means of thesaid spiral conveyer will be dropped ontothese trays its normal loadthe peripheral conveyer in the bottom of thedrum will'be covered by the material as is indicated by the dotted line'in Fig; 6. The advantageof this is that the conveyerI} will feed somuch of the material as it engages (s'ee much of the material as liesabove the conveyer -will tend .to fall back over the conveyerand thematerial as-ja -whole will thus become more thoroughly mixed than if thedepth of material-were. less and it were merely. fed.

from one. end of the drum to the other without intermingling.

The bin G is provided with a suitable gate.

(not shown) and from-fits lower end runs a spout G which entersayproperly 'proportioned opening at the inlet end of the r drum (seeFig.4), sci-that upon opening the gate the entire contents or so much ofthe contents ofthe bin as is desired-will be fed into the drum. For theurpose of drying the contents of the drum. prefer. to provide an oilburner. M of any ordinary construction, preferably one under a heavydraft, s'o theta flame from this burner will projectinto the drum, and"to direct its course I provideea flueMfl preferably lined withfirebrick, the farther end of: which projects into the interiorof thedrum L. [iuthfis fine the oil is gasified and'coi'ntmslion is partially'.completed beforo t he gases enter the driim. The pump C serves toproing.

vide a fuel under sufiicient pressure or draft .to throw considerableflame and heat intothe interior of thedru'm, sufficient in n short timeto dry the contents of the drum.

In addition to the above described mechanism I haveshown a kettle N andweighing mechanism N by means of which .a proper amount of-- bituminouscement or other like material may be weighed andthen dumped into asuitable trough N" which" shall lead it into the i'nteriofbf; the drum;In addition, also, I provide. means such' as an adjustable trough. by-whi ch the -drum shall be emptied. For this'purpose there is shown at Pways upon which slides-a trough P, p, p .beinghandles attached to. the

trough by means of which its position mayw' be changed. As shown in Fig.G'th'e trough P is in its inoperative position. In Fi ..1

it is in operative position so-that the'contents of the trays Lwilljdrop upon itand be directed to a cart or other suitable receptacleoutside the drumv instead of falling' upon the trough Kt.

In the operation of my machine'vston of proper grades are-fed into thehopper f and by means of the. conveyor contained within the casing -Fare/conveyed to the top of the casing-and there fed through the trongh'1 into the bin -G;. the enginebeing first started so that the movingparts v are set in .motion and the pump-operated. The

' fuel at M is.lighted;and-the pump supplying fuel and draft forces thefiame'well into v the interior of thedrum L. The gate of on the troughGr andgfrom it into the .in-' teriorof the drum L which is then .rotabperipheral c'onveyer L until the farther 31 00 the bin is then openedand the-contents falls The rotation of the drum gradually I .feeds thematerial along by means'of the loo.

end is reached when. the material is fed onto 7 the trays L and droppedinto the -trough.

By means of the; axial conveyer 1K. which rotates in-the oppositedirection from the drum the stones are fed to the entrance to the drumagain and fall over so as to be;

again reached andmoved' by the peripheral conveyer L; Itiunderstoodthat-for the best results the drumisaintended to receive .adepth of stone greateixt-han the width of the peripheral conveyor sovthat while this process is going on a portion only of the stone is fed,the rest falling back over the conveyer and gradually workingits Waybetween the conveyers to befed inits turn.

During all this; time the fiarne is creating.

a .stron'g' drying temperature within the.

.drxim so that the stones asithey are constantly presented to the dryingaction of the air or flame are-thoroughly. dried within a i very short;thine: and the same] time are heated to a proper temperattlre tu mwellwith the wafihbituminous cement The next stop in the process ofpreparing a pavc- I surfacm and a semzuti spiral cunveyer 10- caic-d atsubmanhafly Hm arus. m sun]. firs! named 'mnjayon .mns for transferring}material con a-yed by said first named 00!) H'fifil t0 ;-v-.1i i wroxdconveyer, and 112mm 'whareby said drum and saic'i second mm veyer raiawdin opposite directions.

7. In a csncrets mixer :1 drum, :1

conveyer attached to Kim mmw qn aripfiemi surface thermf, a secondspiral mated at the aims of said located below 1% 1'0 cmiperaie wlth 1!,and

series of (ray; located at nne end (If the drum to receive material fromsaid first namad cnn vnycr and delvor Hi to sai sea-find drum means forrat-Ming said drum, means for positively feeding its contents from end Ito and in an? dizrwiiiiom and means f0;- posiiiwal x' feeding; itscmxtents rum and to and in the uppns te iiimciion, mans Located at (1W1!22nd of 1 id drum for ieiivering the cum-wig of each of baid feedingmeans to the ufiwr. whereby amid material may be i 'ful from nd to i ofthe drum repeatedly,

means for suppl ng heat 14 The interim of I the 52mm and 111mm muvableinto the drum adapts? in receive the contents of the drum um?alireczmrgu said mntents outside of said drum.

HORACE W. AS'EL \Vit messes: Y EL E. FLABERTY, E GEORGE DAM-WON.

